Motor temperature-controlling means



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MOTOR TEMPERATURE CONTROLLING MEANS.

FILED JAN-19,1921.

tented den. 1 11* STANLEY H. PAGE, 015 SAN FRANCISCO, AND JACOB 1B. STR'UBLE, OF OAKLAND, CALI- FORNIA.

MOTOR TEMPERATURE-CONTROLLING MEANS.

Application filed January 19, 1921. Serial No. 438,519.

To all whom it may concern:

Be it known that we, STANLEY H. PAGE and JACOB B.

ty of San Francisco, and @akland, in the county of Alameda and State of California, respectively, have invented certain new and useful Improvements in Motor Temperatum-Controlling Means, of which the folof the'cylinder of an internal combustion lowing is a specification.

By the present invention, the temperature engine is automatically varied inversely with the power output thereof. 4

To obtain maximum vaporization without spontaneous combustion or detonation occurring'within the combustionspace, the explosive charge within the cylinder should always be heated toa point slightly below its self-ignition temperature, and since a 'high powerv output causes a higher temperature within the cylinder and ItS'SIIIIOUIIde ing walls than does a smaller power output,

it is necessary in order to avoid temperatures conducive to self-ignition that the circulation of the cooling fluid about the cylinders be controlled so as to vary the cylinder temperature inversely with-the power output thereof and thus compensate for the different temperatures that accompany variations in power output.

This invention varies the temperature of the cylinder through means controlled by a variation in pressure within the intake passage or manifold of the engine, which pressure varies with and bears a definite rela lln the drawings illustrating the preferredembodiment of our invention Figure 1 illustrates the invention applied to the engine intake manifold and operating a radiatorshutter, the movable operating element disclosed in the position indi- STRUBLE, citizens of the I United States, residing at the city and couneating the moton operating under a light load.

Figure 2 is a view similar to Figure 1 disclosing" the movable operating element in a position indicating the motor operating under a heavy load.

Figure 3 is a view similar to Figure 1 with a valve positioned within the cooling system and the shutter eliminated.

Figure 4 is a view similar to Figure 3 with the valve in open position indicating the motor operating under a heavy load.

In the drawings, wherein like characters of reference designate corresponding parts throughout the several views, 1 indicates the cylinder of an internal combustion motor provided with an inlet manifold 2, and through Which the passage of the fuel is controlled by a suitable throttle valve 3 of an well known type. The cylinder is provi ed with a water jacket 4, and associated therewith is a circulating coolin system for containing a cooling fluid, as or example water, and the system consists of a radiator 5 of any well known type connected at its top and bottom with the top and" bottom of the 'acket by the respective pipes 6 and 7.

T e manifold 2 is provided "intermediate of its point of communication with the cylinder 1, and the throttle valve 3 with a laterally extending in bular portion 8, to the end of which is secured a shell 9 provided with a restricted orifice 1O affording a communication between the interior of the shell and the manifold. Associated with the shell is a pressure operated member 11 illustrated in the form of a diaphragmheld in the position to close the shell by a ring 12. The diaphragm is of the well known flexible type, and, when the motor is operating under a comparatively heavy load, under which condition a high pressure exists in the manifold due to the relatively full opening of the throttle, assumes an essentially flat position. @n the reduction of the power output of the cylinder or the running of the motor under a light load or idling, the flow of fuel through the manifold 2 is materially reduced by the moving to closed position of the throttle valve, the pressure within the inlet manifold due to the closing thereof being decreased accordingly. This decrease in pressure in the manifold acts on the diaphragm and causes an inward deflection thereof, as indicated in Figures 1 and 3. By

' elongated arm 18. The bell cranks 1 connecting the shell with the interior of the manifold through a restricted opening, the diaphragm is relieved of the pressure pulsations present in the manifold under normal operating conditions.

The means for automatically varying the temperature of the engine .cylinder in accordance With the pressure in the inlet .manifold and the related power output of the cylinder is constructed as follows The diaphragm connects through a link 13 with one arm of a fulcrumed bell crank 14, and the other arm of said bell crank through a link 15 with one arm of a bell crank 16, said bell crank having and 16 in Figures 3 and 4 are reversed to those in Figures 1 and 2, and in the respective disclosures co-operating bell cranks are disposed in the same direction.

In the embodiment illustrated in Figures 1 and 2, a shutter consisting of pivotally mounted slats 19 is positioned to control the passage of cooling air through the radiator 5.- The slats 19 connect through an operating rod 20 pivotally associated therewith with the elongated arm 18, which, on the movement of the diaphragm 11 in accordance with the variation of pressure within the inlet manifold depending on the power output of the cylinder admit more or less air to the radiator to maintain increase or reduce the temperature of the cooling water or fluid therein.

In Figures 3 and 4, we eliminate the shutters'and position within the pipe 6 a valve 21 connected through a link 22 with the arm 18 of the bell crank, and in this embodiment the movement of the diaphragm operates the valve 21 to retard the circulation of cooling medium and thus accomplish the same result as described in connectlon with the operation of the shutter in Figures 1 and 2.

Having thus described our invention what We claim as new and desire to secure by Letters Patent of the United States is 1. In combination with an internal combustion .motor. provided with an element for normally cooling the cylinder thereof, and an inlet manifold having a throttle valve associated therewith, of means operated by the variation of pressure within the inlet manifold for automatically varying the heat absorbing capacity of said cooling element in accordance with a variation in the power output of the engine cylinder to vary the temperature of the cylinder inversely with a variation in the power output thereof.

2. In combination with an internal combustion motor provided with an element for.

normally cooling the cylinder thereof, and an inlet manifold having a throttle valve associated therewith, of means communieating with the interior of the manifold intermediate of said cylinder and throttle valve for automatically controlling said cooling element in accordance with a variation in the power outputof the cylinder to vary the temperature of the cylinder inversely with a variation in the power output thereof.

3. In combination with an internal combustion motor provided with an element for normally coolin the cylinder thereof, and an inlet manifodd having a throttle valve associated therewith, a movable pressure ac tuated member communicating with the interior of the manifold and operated by the variation of pressure therein for automatically varying the heat absorbing capacity of said coolingelement in accordance with a variation in the pressure within said inlet manifold to vary the temperature of the cylinder inversely with a'variation in the power output thereof.

4. In combination with an internal combustion motor provided with an element for normally cooling the cylinder thereof. and an inlet manifold having a throttle valve associated therewith, of means actuated automatically by the variation of pressure in the inlet manifold for-varying the heat absorbing capacity of said cooling element in accordance with a variation in the power output of the engine cylinder whereby the charge within the cylinder receives a relatively large amount of heat when low pressure exists in the manifold.

5. In combination with an internal combustion motor provided with an element for normally cooling the cylinder thereof, and an inlet manifold having a throttle valve associated therewith, of means actuated automatically by the variation of pressure in the inlet manifold for varying the heat absorbing capacity of said cooling element in accordance with a variation in the power output of the engine cylinder whereby the charge within the cylinder receives a relatively small amount of heat when high pressure exists in the manifold.

' 6. In combination-with an internal combustion motor provided with an element for normally cooling the cylinder thereof, and an inlet manifold having a throttle valve associated therewith, of means automatically actuated by the variation of pressure in the inlet manifold for varying the heat absorbing capacity of said cooling element in accordance with a variation in the power output of the engine cylinder whereby the charge within the cylinder receives a proportionately increasing amount of heat as the pressure within the manifold decreases.

In testimony whereof we have signed our names to this specification. 

